You do an experiment in which you need 0.5 mole of tyrosine (c9h11no3) .

how many grams must you weigh out?

65 g

90.5 g

181 g

272 g

90.5 g

Explanation:

we know 1 mole of thyrosine = 181g

so 0.5 mole thyrosine =181*0.5

                                      =90.5g

Option (b) is the correct answer.

Explanation:

Number of moles given are 0.5 mol and molar mass of tyrosine () is 181.19 g/mol.

Therefore, calculate the mass of given molecules follows.

   No. of moles of tyrosine =

                              0.5 mol =

                           mass = 90.595 g

Therefore, we can conclude that mass of 0.5 mole of tyrosine () is 90.5 g.